A006139

Sequences linked to this entry ?

• A008556: Triangle of coefficients of Legendre polynomials 2^n P_n (x). match row sums
  1 · 2 · 6, 2 · 20, 12 … Σ 1, 2, 8, 32, 136, 592, 2624, 11776, …
  (−∞, 0)nonnegative
• A115951: Expansion of 1/sqrt(1-4*x*y-4*x^2*y). match row sums
  1 · 0, 2 · 0, 2, 6 · 0, 0, 12, 20 … Σ 1, 2, 8, 32, 136, 592, 2624, 11776, …
  (−∞, 0]nonnegative